package heima.com.filter;

import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
//@WebFilter("/loginServlet")
public class LoginFilter implements Filter {
    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        HttpServletRequest request= (HttpServletRequest) servletRequest;
        HttpServletResponse response= (HttpServletResponse) servletResponse;
        Object name = request.getSession().getAttribute("name");
        if (name==null||"".equals(name)){
            response.sendRedirect(request.getContextPath()+"/index.jsp");
            return;
        }
        filterChain.doFilter(request,response);
    }
}
